如何获取当前时间的模板(C++)

#include<iostream>
#include<time.h>

int main()
{
    // typedef __time64_t time_t;
    // typedef __int64 __time64_t;
   time_t ti =  time(NULL);
   std::cout << ti << std::endl;
   /*
    struct tm
    {
        int tm_sec;   // seconds after the minute - [0, 60] including leap second
        int tm_min;   // minutes after the hour - [0, 59]
        int tm_hour;  // hours since midnight - [0, 23]
        int tm_mday;  // day of the month - [1, 31]
        int tm_mon;   // months since January - [0, 11] // 具体需要+1
        int tm_year;  // years since 1900   //具体需要+1900
        int tm_wday;  // days since Sunday - [0, 6]
        int tm_yday;  // days since January 1 - [0, 365]
        int tm_isdst; // daylight savings time flag
    };*/
   tm* tm_time = localtime(&ti); //localtime将传进入的秒转化为结构体tm
   char buf[128] = { 0 };
   snprintf(buf, 128, "%4d/%02d/%02d %02d:%02d:%02d",
       tm_time->tm_year + 1900,
       tm_time->tm_mon+1,
       tm_time->tm_mday,
       tm_time->tm_hour,
       tm_time->tm_min,
       tm_time->tm_sec);
   std::cout << buf << std::endl;
    return 0;
}